CN105441705B - A kind of preparation method of high-strength and high-ductility aluminium alloy - Google Patents
A kind of preparation method of high-strength and high-ductility aluminium alloy Download PDFInfo
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- CN105441705B CN105441705B CN201510783456.4A CN201510783456A CN105441705B CN 105441705 B CN105441705 B CN 105441705B CN 201510783456 A CN201510783456 A CN 201510783456A CN 105441705 B CN105441705 B CN 105441705B
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 67
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 40
- 238000005266 casting Methods 0.000 claims abstract description 34
- 238000000034 method Methods 0.000 claims abstract description 30
- 238000000889 atomisation Methods 0.000 claims abstract description 24
- 238000007731 hot pressing Methods 0.000 claims abstract description 24
- 238000001192 hot extrusion Methods 0.000 claims abstract description 22
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 21
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 20
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000004411 aluminium Substances 0.000 claims abstract description 20
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 20
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052802 copper Inorganic materials 0.000 claims abstract description 20
- 239000010949 copper Substances 0.000 claims abstract description 20
- 229910052742 iron Inorganic materials 0.000 claims abstract description 20
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 20
- 239000011777 magnesium Substances 0.000 claims abstract description 20
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000011572 manganese Substances 0.000 claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 16
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 14
- 239000011701 zinc Substances 0.000 claims abstract description 13
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims abstract description 9
- 238000004321 preservation Methods 0.000 claims abstract description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 28
- 229910052757 nitrogen Inorganic materials 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 7
- 238000001125 extrusion Methods 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- 238000010792 warming Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 2
- 235000010210 aluminium Nutrition 0.000 description 14
- 239000011159 matrix material Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/0408—Light metal alloys
- C22C1/0416—Aluminium-based alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses a kind of preparation methods of high-strength and high-ductility aluminium alloy, include the following steps: S1, aluminium ingot, zinc ingot metal, magnesium ingot, copper ingot and ingot iron are put into intermediate frequency vaccum sensitive stove melt to form aluminium alloy, carry out refinery by de-gassing, carry out heat preservation standing, casting obtains ingot casting, wherein the regulation of aluminium alloy component is carried out before casting, the component of aluminium alloy after regulation are as follows: zinc 2.5-3.4wt%, magnesium 2.2-2.6wt%, copper 0.1-0.3wt%, iron 0.8-1.6wt%, manganese 0.5-1.5wt%, surplus are aluminium；S2, the atomized powder of atomization process then is carried out to ingot casting；It is uniformly mixed after S3, atomized powder removal bulky grain material, then carries out vacuum hotpressing, then carry out hot extrusion, extruded rod solution treatment obtains high-intensity and high-tenacity aluminium alloy.Atomization process is carried out by the proportion of reasonable control element, and to ingot casting, vacuum hotpressing, obtained intensity of aluminum alloy is high, good toughness.
Description
Technical field
The present invention relates to a kind of preparation method of aluminium alloy more particularly to a kind of preparation sides of high-strength and high-ductility aluminium alloy
Method.
Background technique
Aluminium alloy is most widely used one kind non-ferrous metal structural material in industry, in Aeronautics and Astronautics, automobile, machinery
It has been widely applied in manufacture, ship and chemical industry.The rapid development of industrial economy, the demand day to aluminum alloy piping welding structural member
Benefit increases, and the Research on Weldability enabled aluminum alloy to is also goed deep into therewith.Aluminium alloy density is low, but intensity is relatively high, near or above excellent
Matter steel, plasticity is good, can be processed into various profiles, has excellent electric conductivity, thermal conductivity and corrosion stability, is industrially widely used,
Usage amount is only second to steel.Some aluminium alloys can obtain good mechanical performance, physical property and corrosion resistance using heat treatment
Energy.
High-performance aluminium alloy is widely used in the fields such as aviation and communications and transportation, is a kind of important structural material.With
The development of science and technology, the requirement to intensity of aluminum alloy and toughness increasingly improves, to guarantee safety that aluminium alloy parts use
Property, the plasticity and toughness of material are improved, usually to reduce the intensity of material as cost.Therefore, high-strength in vital
While spending, the toughness of material is improved, is one of project important in aluminium alloy research field.
Summary of the invention
To solve technical problem present in background technique, the present invention proposes a kind of preparation side of high-strength and high-ductility aluminium alloy
Method carries out atomization process by the proportion of reasonable control element, and to ingot casting, and vacuum hotpressing, obtained intensity of aluminum alloy is high, tough
Property is good.
A kind of preparation method of high-strength and high-ductility aluminium alloy proposed by the present invention, includes the following steps:
S1, the intermediate frequency vaccum sensitive stove that aluminium ingot, zinc ingot metal, magnesium ingot, copper ingot and ingot iron be put into 800-850 DEG C melt to form conjunction
Golden liquid carries out heat preservation at 800-820 DEG C and stands 40-60min in 750-780 DEG C of progress refinery by de-gassing, and casting obtains ingot casting,
In, the regulation of aluminium alloy component, the component of aluminium alloy after regulation are as follows: zinc 2.5-3.4wt%, magnesium 2.2- are carried out before casting
2.6wt%, copper 0.1-0.3wt%, iron 0.8-1.6wt%, manganese 0.5-1.5wt%, surplus are aluminium；
S2, the atomized powder of atomization process then is carried out to ingot casting；
It is uniformly mixed after S3, atomized powder removal bulky grain material, then carries out vacuum hotpressing, then carry out hot extrusion, squeeze
Stick solution treatment obtains high-intensity and high-tenacity aluminium alloy.
Preferably, in S1, the component of aluminium alloy after regulation are as follows: zinc 2.8-3.2wt%, magnesium 2.3-2.5wt%, copper 0.15-
0.25wt%, iron 0.9-1.5wt%, manganese 0.8-1.2wt%, surplus are aluminium.
Preferably, in S1, the component of aluminium alloy after regulation are as follows: zinc 2.95wt%, magnesium 2.4wt%, copper 1.2wt%, iron
1.2wt%, manganese 1.0wt%, surplus are aluminium.
Preferably, in S2, the temperature of atomization process is 820-870 DEG C, and gas used in atomization process is nitrogen, nitrogen
Pressure be 0.40-0.45MPa.
Preferably, in S3, the temperature of vacuum hotpressing is 460-480 DEG C, and the pressure of vacuum hotpressing is 480-520MPa.
Preferably, in S3, the temperature of hot extrusion is 480-500 DEG C, and the extrusion ratio of hot extrusion is 20-30:1-3.
Preferably, in S3, the mode of extruded rod solution treatment are as follows: it is warming up to 380-420 DEG C first, keeps the temperature 0.5-1.5h,
480-500 DEG C is then heated to, keeps the temperature 0.5-1.5h, then water cooling 1-3h.
It is properly added by the element ratio in regulation aluminium alloy component by reducing the content of Zn-ef ficiency in the present invention
The content of manganese element, not only refine crystal grain, hinder matrix grain grow up and recrystallize, moreover, do not sacrifice aluminium alloy plasticity and
In the case where toughness, the intensity of aluminium alloy is improved significantly.
By improving solid solubility temperature, the more soluble precipitated phases made dissolve in α-Al matrix, improve the supersaturation of matrix
Degree, so that more disperse phases be precipitated in aluminium alloy timeliness, improves the intensity of material.
The high strength alumin ium alloy of manganese toughening, not formed block-like phase containing manganese in aluminium alloy are prepared for using the method for powder metallurgy
It is precipitated, containing manganese mutually with Al6Mn and AlCu2The form disperse educt of Mn is simultaneously uniformly distributed.The tensile strength of aluminium alloy reaches
774MPa, yield strength 755MPa；A certain amount of manganese element, Ke Yixi are added in the ultrahigh-strength aluminum alloy of high zinc content
Change crystal grain, reduces fracture dimple size, grain boundary fracture proportion in fracture can also be reduced, improve the fracture of high strength alumin ium alloy
Tissue morphology is conducive to the toughness for improving aluminium alloy.
Specific embodiment
The present invention is described in detail combined with specific embodiments below, it should be appreciated that embodiment is served only for illustrating this hair
It is bright, rather than for limiting the invention, any modification made on the basis of the present invention, equivalent replacement etc. are in this hair
In bright protection scope.
Embodiment 1
A kind of preparation method of high-strength and high-ductility aluminium alloy proposed by the present invention, includes the following steps:
S1, the intermediate frequency vaccum sensitive stove that aluminium ingot, zinc ingot metal, magnesium ingot, copper ingot and ingot iron be put into 825 DEG C melt to form alloy
Liquid carries out heat preservation at 810 DEG C and stands 50min, casting obtains ingot casting, wherein advance in casting in 765 DEG C of progress refinery by de-gassing
The regulation of row aluminium alloy component, the component of aluminium alloy after regulation are as follows: zinc 2.95wt%, magnesium 2.4wt%, copper 1.2wt%, iron
1.2wt%, manganese 1.0wt%, surplus are aluminium；
S2, the atomized powder of atomization process then is carried out to ingot casting, the temperature of atomization process is 845 DEG C, atomization process institute
The gas used is nitrogen, and the pressure of nitrogen is 0.425MPa；
It is uniformly mixed after S3, atomized powder removal bulky grain material, then carries out vacuum hotpressing, then carry out hot extrusion, squeeze
Stick solution treatment obtains high-intensity and high-tenacity aluminium alloy, wherein the temperature of vacuum hotpressing is 470 DEG C, and the pressure of vacuum hotpressing is
500MPa；The temperature of hot extrusion is 490 DEG C, and the extrusion ratio of hot extrusion is 25:2；The mode of extruded rod solution treatment are as follows: rise first
Temperature keeps the temperature 1.0h to 400 DEG C, then heats to 490 DEG C, keeps the temperature 1.0h, then water cooling 2h.
Embodiment 2
A kind of preparation method of high-strength and high-ductility aluminium alloy proposed by the present invention, includes the following steps:
S1, the intermediate frequency vaccum sensitive stove that aluminium ingot, zinc ingot metal, magnesium ingot, copper ingot and ingot iron be put into 800 DEG C melt to form alloy
Liquid carries out heat preservation at 800 DEG C and stands 60min, casting obtains ingot casting, wherein advance in casting in 780 DEG C of progress refinery by de-gassing
The regulation of row aluminium alloy component, the component of aluminium alloy after regulation are as follows: zinc 2.5wt%, magnesium 2.6wt%, copper 0.1wt%, iron
1.6wt%, manganese 0.5wt%, surplus are aluminium；
S2, the atomized powder of atomization process then is carried out to ingot casting, the temperature of atomization process is 820 DEG C, atomization process institute
The gas used is nitrogen, and the pressure of nitrogen is 0.45MPa；
It is uniformly mixed after S3, atomized powder removal bulky grain material, then carries out vacuum hotpressing, then carry out hot extrusion, squeeze
Stick solution treatment obtains high-intensity and high-tenacity aluminium alloy, wherein the temperature of vacuum hotpressing is 460 DEG C, and the pressure of vacuum hotpressing is
520MPa；The temperature of hot extrusion is 480 DEG C, and the extrusion ratio of hot extrusion is 30:1；The mode of extruded rod solution treatment are as follows: rise first
Temperature keeps the temperature 0.5h to 420 DEG C, then heats to 500 DEG C, keeps the temperature 0.5h, then water cooling 3h.
Embodiment 3
A kind of preparation method of high-strength and high-ductility aluminium alloy proposed by the present invention, includes the following steps:
S1, the intermediate frequency vaccum sensitive stove that aluminium ingot, zinc ingot metal, magnesium ingot, copper ingot and ingot iron be put into 850 DEG C melt to form alloy
Liquid carries out heat preservation at 820 DEG C and stands 40min, casting obtains ingot casting, wherein advance in casting in 750 DEG C of progress refinery by de-gassing
The regulation of row aluminium alloy component, the component of aluminium alloy after regulation are as follows: zinc 3.4wt%, magnesium 2.2wt%, copper 0.3wt%, iron
0.8wt%, manganese 1.5wt%, surplus are aluminium；
S2, the atomized powder of atomization process then is carried out to ingot casting, the temperature of atomization process is 870 DEG C, atomization process institute
The gas used is nitrogen, and the pressure of nitrogen is 0.40MPa；
It is uniformly mixed after S3, atomized powder removal bulky grain material, then carries out vacuum hotpressing, then carry out hot extrusion, squeeze
Stick solution treatment obtains high-intensity and high-tenacity aluminium alloy, wherein the temperature of vacuum hotpressing is 480 DEG C, and the pressure of vacuum hotpressing is
480MPa；The temperature of hot extrusion is 500 DEG C, and the extrusion ratio of hot extrusion is 20:3；The mode of extruded rod solution treatment are as follows: rise first
Temperature keeps the temperature 1.5h to 380 DEG C, then heats to 480 DEG C, keeps the temperature 1.5h, then water cooling 1h.
Embodiment 4
A kind of preparation method of high-strength and high-ductility aluminium alloy proposed by the present invention, includes the following steps:
S1, the intermediate frequency vaccum sensitive stove that aluminium ingot, zinc ingot metal, magnesium ingot, copper ingot and ingot iron be put into 810 DEG C melt to form alloy
Liquid carries out heat preservation at 805 DEG C and stands 55min, casting obtains ingot casting, wherein advance in casting in 770 DEG C of progress refinery by de-gassing
The regulation of row aluminium alloy component, the component of aluminium alloy after regulation are as follows: zinc 2.8wt%, magnesium 2.5wt%, copper 0.15wt%, iron
1.5wt%, manganese 0.8wt%, surplus are aluminium；
S2, the atomized powder of atomization process then is carried out to ingot casting, the temperature of atomization process is 860 DEG C, atomization process institute
The gas used is nitrogen, and the pressure of nitrogen is 0.41MPa；
It is uniformly mixed after S3, atomized powder removal bulky grain material, then carries out vacuum hotpressing, then carry out hot extrusion, squeeze
Stick solution treatment obtains high-intensity and high-tenacity aluminium alloy, wherein the temperature of vacuum hotpressing is 475 DEG C, and the pressure of vacuum hotpressing is
485MPa；The temperature of hot extrusion is 495 DEG C, and the extrusion ratio of hot extrusion is 22:2.5；The mode of extruded rod solution treatment are as follows: first
385 DEG C are warming up to, 1.2h is kept the temperature, then heats to 485 DEG C, keeps the temperature 1.2h, then water cooling 1.5h.
Embodiment 5
A kind of preparation method of high-strength and high-ductility aluminium alloy proposed by the present invention, includes the following steps:
S1, the intermediate frequency vaccum sensitive stove that aluminium ingot, zinc ingot metal, magnesium ingot, copper ingot and ingot iron be put into 840 DEG C melt to form alloy
Liquid carries out heat preservation at 815 DEG C and stands 45min, casting obtains ingot casting, wherein advance in casting in 760 DEG C of progress refinery by de-gassing
The regulation of row aluminium alloy component, the component of aluminium alloy after regulation are as follows: zinc 3.2wt%, magnesium 2.3wt%, copper 0.25wt%, iron
0.9wt%, manganese 1.2wt%, surplus are aluminium；
S2, the atomized powder of atomization process then is carried out to ingot casting, the temperature of atomization process is 830 DEG C, atomization process institute
The gas used is nitrogen, and the pressure of nitrogen is 0.44MPa；
It is uniformly mixed after S3, atomized powder removal bulky grain material, then carries out vacuum hotpressing, then carry out hot extrusion, squeeze
Stick solution treatment obtains high-intensity and high-tenacity aluminium alloy, wherein the temperature of vacuum hotpressing is 465 DEG C, and the pressure of vacuum hotpressing is
515MPa；The temperature of hot extrusion is 485 DEG C, and the extrusion ratio of hot extrusion is 28:1.5；The mode of extruded rod solution treatment are as follows: first
415 DEG C are warming up to, 0.8h is kept the temperature, then heats to 495 DEG C, keeps the temperature 0.8h, then water cooling 2.5h.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (6)
1. a kind of preparation method of high-strength and high-ductility aluminium alloy, which comprises the steps of:
S1, the intermediate frequency vaccum sensitive stove that aluminium ingot, zinc ingot metal, magnesium ingot, copper ingot and ingot iron be put into 800-850 DEG C melt to form alloy
Liquid carries out heat preservation at 800-820 DEG C and stands 40-60min, casting obtains ingot casting in 750-780 DEG C of progress refinery by de-gassing, wherein
The regulation of aluminium alloy component, the component of aluminium alloy after regulation are as follows: zinc 2.5-3.4wt%, magnesium 2.2-2.6wt%, copper are carried out before casting
0.1-0.3wt%, iron 0.8-1.6wt%, manganese 0.5-1.5wt%, surplus are aluminium；
S2, the atomized powder of atomization process then is carried out to ingot casting；
It is uniformly mixed after S3, atomized powder removal bulky grain material, then carries out vacuum hotpressing, then carry out hot extrusion, extruded rod is solid
Molten processing obtains high-intensity and high-tenacity aluminium alloy；
The mode of the extruded rod solution treatment are as follows: be warming up to 380-420 DEG C first, keep the temperature 0.5-1.5h, then heat to
490-500 DEG C, 0.5-1.5h is kept the temperature, then water cooling 1-3h.
2. the preparation method of high-strength and high-ductility aluminium alloy according to claim 1, which is characterized in that in S1, closed after regulation
The component of golden liquid are as follows: zinc 2.8-3.2wt%, magnesium 2.3-2.5wt%, copper 0.15-0.25wt%, iron 0.9-1.5wt%, manganese 0.8-
1.2wt%, surplus are aluminium.
3. the preparation method of high-strength and high-ductility aluminium alloy according to claim 1 or 2, which is characterized in that in S1, after regulation
The component of aluminium alloy are as follows: zinc 2.95wt%, magnesium 2.4wt%, copper 1.2wt%, iron 1.2wt%, manganese 1.0wt%, surplus are aluminium.
4. the preparation method of high-strength and high-ductility aluminium alloy according to claim 1, which is characterized in that in S2, atomization process
Temperature be 820-870 DEG C, gas used in atomization process is nitrogen, and the pressure of nitrogen is 0.40-0.45MPa.
5. the preparation method of high-strength and high-ductility aluminium alloy according to claim 1, which is characterized in that in S3, vacuum hotpressing
Temperature be 460-480 DEG C, the pressure of vacuum hotpressing is 480-520MPa.
6. the preparation method of high-strength and high-ductility aluminium alloy according to claim 1, which is characterized in that in S3, hot extrusion
Temperature is 480-500 DEG C, and the extrusion ratio of hot extrusion is 20-30:1-3.
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| CN106222502A (en) * | 2016-08-30 | 2016-12-14 | 中国航空工业集团公司北京航空材料研究院 | The ultrahigh-strength aluminum alloy of a kind of high scandium content and manufacture method thereof |
| CN110234776A (en) * | 2016-11-28 | 2019-09-13 | 麦克马斯特大学 | Aluminium alloy and its production method for structure and non-structural nearly whole continuous casting |
| CN107354352A (en) * | 2017-06-27 | 2017-11-17 | 太仓市雅兴精密冲压件厂 | A kind of preparation technology of high rigidity die casting |
| CN109022929A (en) * | 2018-07-19 | 2018-12-18 | 徐海东 | A kind of high intensity alumal material and preparation method thereof |
| CN111363957B (en) * | 2020-03-25 | 2021-08-31 | 广东领胜新材料科技有限公司 | Lead-free environment-friendly free-cutting aluminum alloy and preparation method and application thereof |
| CN113770368A (en) * | 2021-09-16 | 2021-12-10 | 浙江吉利控股集团有限公司 | TiC particle reinforced aluminum alloy powder for metal 3D printing and preparation method thereof |
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| US4169728A (en) * | 1978-02-09 | 1979-10-02 | Mitsubishi Kinzoku Kabushiki Kaisha | Corrosion resistant bright aluminum alloy for die-casting |
| CN1165632C (en) * | 2001-08-09 | 2004-09-08 | 华南理工大学 | Hyper-eutectic Al-Si alloy material for powder metallurgy and its preparing process |
| CN1271230C (en) * | 2003-03-14 | 2006-08-23 | 北京有色金属研究总院 | Ultrahigh-strength high toughness aluminium alloy material and preparing method |
| CN1263572C (en) * | 2004-10-14 | 2006-07-12 | 北京科技大学 | Method for preparing block of nano aluminum alloy in ultrahigh strength |
| CN101695753A (en) * | 2009-10-23 | 2010-04-21 | 江苏豪然喷射成形合金有限公司 | Method for manufacturing high-strength 7055 aluminum alloy forge piece formed by spraying |
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